Welcome to the Battle Spot ORAS Viability Rankings thread. Here, we as a community will rank every single usable Pokemon into ranks. You're encouraged to post your thoughts and opinions on the Pokemon that are usable in the metagame and what rank they should fall under. The general idea of the topic is to rank Pokemon based on their effectiveness in the Battle Spot singles metagame.

Finally, here are the people that have the final say on what gets moved in the ranking list (as in, the people that gather the community's input to make final decisions, as well as being well informed players themselves):

cant say
DragonWhale
ethan06
Feliburn
Jibaku
NOVED

S Rank
[quote]Reserved for Pokemon that are amazing in the Battle Spot Singles metagame. These Pokemon are usually able to perform a variety of roles effectively, or can just do one extremely well. Their use has low risk involved and high reward exerted. Pokemon in this rank have very few flaws that are patched up by numerous positive traits.[/quote]

Garchomp
Gengar (Mega)
Kangaskhan (Mega)
Thundurus

A Rank
[quote]Reserved for Pokemon that are fantastic in the Battle Spot Singles metagame, and can sweep, support, or wall significant portions of the metagame. These Pokemon require less support than most others to be used effectively and have few flaws that can easily be overlooked when compared to their positive traits.
[/quote]

A+

Aegislash
Azumarill
Blaziken
Blaziken (Mega)
Gengar
Landorus-Therian
Rotom-Wash
Salamence (Mega)
Suicune

A

Charizard (Mega X)
Charizard (Mega Y)
Cresselia
Ferrothorn
Greninja
Heatran
Heracross (Mega)
Mawile (Mega)
Serperior
Slowbro (Mega)
Talonflame
Zapdos

A-

Breloom
Clefable
Gliscor
Gyarados (Mega)
Hippowdon
Lucario (Mega)
Mamoswine
Porygon2
Scizor (Mega)
Slowbro
Tyranitar
Tyranitar (Mega)

B Rank
[quote]Reserved for Pokemon that are great in the Battle Spot singles metagame. These Pokemon have more notable flaws than those above them that affect how they function in the tier. Their positive traits still outshine their negatives, but they require a bit more team support to bring out their full potential.[/quote]
B+

Altaria (Mega)
Conkeldurr
Dragonite
Excadrill
Gardevoir (Mega)
Gyarados
Hydreigon
Klefki
Latios
Lopunny (Mega)
Manectric (Mega)
Metagross (Mega)
Raikou
Rotom-Heat
Sableye (Mega)
Skarmory
Sylveon
Terrakion
Thundurus-Therian
Venusaur (Mega)
Volcarona
Weavile

B

Aerodactyl (Mega)
Bisharp
Chandelure
Gallade (Mega)
Glalie
Latias
Mandibuzz
Sableye
Scizor
Swampert (Mega)
Whimsicott

B-

Aggron (Mega)
Blastoise (Mega)
Chansey
Clawitzer
Diggersby
Feraligatr
Infernape
Magnezone
Pinsir (Mega)
Quagsire
Reuniclus
Scrafty
Sharpedo
Sharpedo (Mega)
Togekiss

C Rank
[quote]Reserved for Pokemon that have notable niches in the Battle Spot singles metagame, but have just as many notable flaws that prevent them from being effective. Pokemon in the C tier often require significant support to be effective. Pokemon from this rank tend to face a lot of competition with the more commonly used Pokemon.[/quote]
C+

Cloyster
Cobalion
Espeon
Houndoom (Mega)
Lucario
Noivern
Rhyperior
Starmie
Tornadus-Therian
Wobbuffet

C

Beedrill (Mega)
Glalie (Mega)
Pidgeot (Mega)
Vaporeon
Vivillon

C-

Escavalier
Scolipede

D Rank
[quote]Reserved for Pokemon that are mediocre in the Battle Spot singles metagame, but are viable enough to justify their use on select teams. These Pokemon are either usable but have no real niche, or are only capable of doing their specific task and fail at doing anything more than that. Pokemon from this rank have multiple crippling flaws that prevent them from being successful a majority of the time, and are often severely outclassed because of it.[/quote]

Camerupt (Mega)
Drifblim
Honchkrow
Steelix (Mega)
Omastar